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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
The effect of two anionic membranes (AMI 7001s and Neosepta AMX) on the electrodeposition of manganese from sulphate
Q L Reyes-Morales1, V E Reyes-Cruz1, A Trujillo Estrada2
1Universidad Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales Carr. Pachuca-Tulancingo km 4.5 s/n Mineral de la Reforma Hidalgo México reyescruz16@yahoo.com.
Abstract:
The effect of two different anionic membranes on manganese deposition was studied in a two-compartment electrochemical reactor with a titanium cathode and a dimensionally stable RuO2|Ti anode. Chronopotentiometry, ICP-OES, SEM, XRD and elemental mapping were used to understand the changes in concentration and characteristics of the metallic deposition at different current densities with the anionic membranes AMI 7001s and Neosepta AMX. The results demonstrate that AMI reduces more manganese than AMX below -100 A m-2, generating more metallic deposition but also more low-solubility manganous by-products, whereas both membranes exhibited similar behaviours above -100 A m-2 reaching the maximum current efficiency (63%) at -200 A m-2. It was also observed that the membranes have a significant effect on sulphate consumption since they are anions.
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